To cite package ‘greybox’ in publications use:

  Svetunkov I (2026). _greybox: Toolbox for Model Building and
  Forecasting_. R package version 2.0.9,
  <https://github.com/config-i1/greybox>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {greybox: Toolbox for Model Building and Forecasting},
    author = {Ivan Svetunkov},
    year = {2026},
    note = {R package version 2.0.9},
    url = {https://github.com/config-i1/greybox},
  }